/Engine/Source/Runtime/Landscape/Classes/LandscapeProxy.h
Exports landscape geometry contained within InBounds into a raw mesh
true if successful
bool ExportToRawMesh ( const [TArrayView](API\Runtime\Core\Containers\TArrayView)< [ULandscapeComponent](API\Runtime\Landscape\ULandscapeComponent) * > & InComponents, int32 InExportLOD, [FMeshDescription](API\Runtime\MeshDescription\FMeshDescription) & OutRawMesh, const FBoxSphereBounds & InBounds, bool bIgnoreBounds, bool bGenerateOnePolygonGroupPerComponent ) const